Spysheriff blocks my desktop background - how to remove Spysheriff

Question:

Answer:

1. Open task manager by pressing Ctrl-Alt-Del, and click on the "Processes" tab. Look for Spysheriff there and kill the process if you see it. If you see a process named "winstall" (winstall.exe) then delete this one also.
2. In the control panel goto "Add/ Remove Programs" and remove the "SpySheriff" program. If it says that it cannot uninstall, then you still have it running. It will uninstall once it's not running.
3. Your desktop background will not be restored by that uninstall. Go into the registry by starting RegEdit.exe from the start button.
   If your registry editor does not work, read this document "I cannot open the registry editor".
4. Look for this key:
   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop
   It will have about 6 values stored that disable certain things. Delete this whole branch ActiveDesktop - the system will work with default values afterwards.
   Also delete this branch in your registry:
   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
5. Look in your root directory for a file named winstall.exe. Mine was in c:\ and 24064 Bytes in size.
   This file is scheduled to execute each time you boot and it will re-install Spysheriff.
   Delete that file.
   Update:
   As MG from Ottawa comments below, there may also be additional executable files that were created at the same time as winstall.exe. Those files may be named 'winstall.exe' and 'ibm00001.exe'. You should delete those files as well. If you have this file ibm0001.exe please see the other article regarding ibm0001.exe.
6. Restart your system.
   Done.

Some people asked about the company that makes SpySheriff. This is their London address:

Company:         SpySheriff Development Team
 Street address:  Tooley 73a 
 City:            London 
 Zip:             EC1Y 1BL 
 Country:         United Kingdom